Ever had trouble matching pieces when making up a garment from a bought pattern (Simplicity, Burda etc)? On my Making Clothes from Patterns course last night we were having a right old time working out which was the side seam, which was the back etc once the pieces were cut out - which made matching the right pieces together slow & frustrating. Once you've cut out the pieces there's often no indication on the cut fabric pieces as to the right way up or round to put things together. Taking a tip from the way we make patterns on the Pattern Cutting course I suggest adding extra notches to your patterns before you pin them to your fabric.
But what are notches? Have you noticed little black triangles on the edges of pattern pieces? They're notches & they help you match pieces together, like a jigsaw puzzle e.g. a back sleeve head has 2 notches on the edge that correspond with 2 notches in the same place on the armhole. You cut them as tiny half-cm-deep snips at a right angle to the cloth (don't cut out the whole triangle, it'll fray!). I often find there aren't enough notches to help you match up effortlessly when sewing though, so I suggest, when making clothes from patterns that you add more of your own:
1. Cut out the paper pattern pieces to your size as usual.
2. Before you pin them to the cloth, look at the illustration below to see where I've drawn extra notches on the paper pattern pieces (the triangle shapes on the edges). Lay the pattern pieces together as you would when you sew and draw little notches on both pieces: for example half way down the side seam on the front and back piece, and 2 notches two thirds of the way down on the centre back, so there's no way you can sew a side to a back, as the notches won't match up. Put even more notches if your garment is cut on the bias as it will help you match up when the fabric stretches.
Adding notches is even more important if like my student Heather's skirt below you have 3 panels in the front and 4 in the back. We added extra notches so it was a bit like a jigsaw puzzle, with each seam having a different notch position from the next seam - then we just couldn't fit the wrong pieces together!